scholarly journals Balanced harvesting in fisheries: a preliminary analysis of management implications‡

2015 ◽  
Vol 73 (6) ◽  
pp. 1668-1678 ◽  
Author(s):  
S. M. Garcia ◽  
J. Rice ◽  
A. Charles
Keyword(s):  
Fisheries Management ◽  
Preliminary Analysis ◽  
Fishery Management ◽  
Sustainable Use ◽  
Relative Size ◽  
Implementation Challenges ◽  
Multispecies Fisheries ◽  
Natural Productivity ◽  
Partial Implementation ◽  
Spawning Sites

Abstract Balanced harvest (BH) proposes to distribute a moderate mortality from fishing across the widest possible range of species, stocks, and sizes in an ecosystem, in proportion to their natural productivity so that the relative size and species composition are maintained, in line with the CBD requirement for sustainable use. This proposal has many and not always intuitive implications for fisheries management, e.g. in relation to selectivity, protection of juveniles and spawning sites, models of harvesting strategies, a focus on size and species, the impacts of discarding, aspects of emblematic species and ecosystem services, operational complexity, partial implementation, ecosystem rebuilding, and relations with broader management frameworks. The paper closes with a discussion of BH implementation, concluding that a logical step would be to integrate several separate initiatives to move fisheries into a more ecosystem-conscious context. Implementation challenges will be encountered, but there are lessons to be drawn from fishery ecosystems already close to BH, as in some tropical multispecies fisheries, and further, the implementation challenges are already being taken on in many well-managed fisheries and areas as management begins to address the realities of what ecosystem-based fishery management actually entails.

scholarly journals KAJIAN EKSTERNALITAS DAN KEBERLANJUTAN PERIKANAN DI PERAIRAN WADUK JATILUHUR

2017 ◽  
Vol 4 (2) ◽  
pp. 137
Author(s):  
Sonny Koeshendrajana ◽  
Rizki Aprilian Wijaya ◽  
Fatriyandi Nur Priyatna ◽  
Pujoyuwono Martosuyono ◽  
Sutrisno Sukimin
Keyword(s):  
Fisheries Management ◽  
Fishery Management ◽  
Management Practices ◽  
Management Practice ◽  
Sustainable Use ◽  
Secondary Data ◽  
Primary Data ◽  
Natural Food ◽  
Management Pattern ◽  
Policy And Strategy

Eksternalitas dapat diartikan sebagai dampak dari suatu kegiatan tertentu terhadap kegiatan lainnya. Dalam konteks pengelolaan sumberdaya perairan, eksternalitas sangat penting diketahui mengingat hal tersebut dapat menyebabkan terjadinya alokasi pemanfaatan sumberdaya yang tidak efisien dan selanjutnya mempengaruhi kinerja keberlanjutan pemanfaatannya. Oleh karena itu, penelitian bertujuan mengkaji eksternalitas dan status keberlanjutan perikanan pada sumberdaya perairan waduk di waduk Jatiluhur. Penelitian ini dilakukan selama bulan Juli-Desember 2009. Secara spesifik, kegiatan penelitian difokuskan untuk mendapatkan data dinamika pengelolaan perikanan, eksternalitas dan status keberlanjutan pola pengelolaan perikanannya. Studi kasus digunakan pada penelitian ini. Data primer diperoleh melalui survei lapang dan data sekunder diperoleh melalui penelusuran dan kajian literatur terkait topik penelitian. Metoda analisis deskriptif kualitatif dan tabulatif digunakan dalam penelitian ini. Hasil penelitian menyajikan gambaran dinamika pengelolaan perikanan yang ada. Eksternalitas dan status keberlanjutan pola pengelolaan perikanan yang ada dieksplorasi berdasarkan lima pelaku pemanfaat yang teridentifikasi, yaitu perikanan tangkap, perikanan budidaya, wisata pemancingan, transportasi dan manajemen waduk. Keberlanjutan bagi pemanfaatan perikanan waduk dapat terjamin apabila pelaku usaha melakukan optimalisasi sesuai dengan daya dukung perairan bagi perikanan budidaya dan menjalankan pilihan pengelolaan perikanan tangkap dalam bentuk penerapan alat dan metoda penangkapan yang ramah lingkungan, penebaran ikan yang dapat memanfaatkan kesuburan perairan. Hasil kajian dapat digunakan oleh otoritas pengelola waduk sebagai rujukan bagi rumusan kebijakan pengelolaan perikanan di waduk Jatiluhur. Tittle: Externality and Sustainablity of Fisheries in the Jatiluhur ReservoirExternality can be defined as an impact of a certain activity to other activity. In the context of fisheries resource management, externality is important to understand due to its impact on in-efficiency resource allocation, and hence, affecting to the sustainable use of the resource. Therefore, research aimed at exploring externalities and sustainability status of fisheries in the Jatiluhur reservoir was carried out during July – December 2009. Specifically, the research was focused to find the dynamic pattern of fisheries related activities, externalities and sustainability status of the fisheries management pattern. Case study method was used in this study. Primary and secondary data were used in this study. Primary data were collected through field survey while secondary data were collected through literatures review on the relatedtopic of the study. Analyses were carried out descriptively both qualitative and tabulative data and information. Results of the study show dynamic illustration of the fisheries management practices in the Jatiluhur reservoir resource. Externalities and sustainability status of fisheries management pattern were explored based on five players being identified, namely capture fishery, aquaculture, sport fishing, transportation and reservoir management. Sustainability of each activity could be maintained if fish farmers operate cage culture optimally in accordance with the carrying capacity of the resource while fishery management implements the appropriated fishing gears and methods as well as stocking recommended species of fish to utilize the abundance of natural food. The results can be used by management authority as a basis for formulating policy and strategy fisheries management practice in the Jatiluhur reservoir.

scholarly journals Validation of a feedback harvest control rule in data-limited conditions for managing multispecies fisheries

2019 ◽  
Vol 76 (10) ◽  
pp. 1885-1893 ◽  
Author(s):  
Ledhyane Ika Harlyan ◽  
Dengke Wu ◽  
Ryosuke Kinashi ◽  
Methee Kaewnern ◽  
Takashi Matsuishi
Keyword(s):  
Fisheries Management ◽  
Fishery Management ◽  
Fishing Effort ◽  
Maximum Sustainable Yield ◽  
Mixed Species ◽  
Multispecies Fisheries ◽  
Strategy Evaluation ◽  
Sustainable Fishery ◽  
Species Specific ◽  
Slow Growing

Harvest control rules (HCRs) for sustainable fishery management have been developed for data-limited fish species for which stock assessments cannot be conducted. However, HCRs have largely not considered mixed-species catches, as when fishing-effort data are widely pooled for numerous minor species in a multispecies fishery. Presently, a feedback HCR has been successfully applied in Japanese fisheries management. By combining management strategy evaluation with a simulation to generate mixed-species data from a multispecies fishery that assume constant catchability (q) among species, we evaluated the performance of this feedback HCR and then compared its performance using species-specific data. In most cases, the biomass was controlled over that needed for maximum sustainable yield (MSY), and the fishing effort was under the fishing mortality consistent with achieving MSY (FMSY). However, for slow-growing species, the biomass might become lower than what is required to remain capable of producing MSY, even though fishing effort was controlled under FMSY. The results show that the feedback HCR is appropriate for multispecies fisheries management where only mixed-species data are available but with special monitoring for slow-growing minor species.

scholarly journals Assessment on the governance of fisheries management at fishery management area in Indonesia

2021 ◽  
Vol 716 (1) ◽  
pp. 012022
Author(s):  
Umi Muawanah ◽  
Nendah Kurniasari ◽  
Radityo Pramodha ◽  
Armen Zulham ◽  
Lathifatul Rosyidah
Keyword(s):  
Fisheries Management ◽  
Fishery Management ◽  
Management Area

scholarly journals Inclusion of ecological, economic, social, and institutional considerations when setting targets and limits for multispecies fisheries

2017 ◽  
Vol 74 (2) ◽  
pp. 453-463 ◽  
Author(s):  
Anna Rindorf ◽  
Catherine M. Dichmont ◽  
James Thorson ◽  
Anthony Charles ◽  
Lotte Worsøe Clausen ◽  
...  
Keyword(s):  
Fisheries Management ◽  
Multiple Objectives ◽  
Fisheries Governance ◽  
Ecological Economic ◽  
Multispecies Fisheries ◽  
Institutional Aspects ◽  
New Research ◽  
Ecosystem Based Fisheries Management ◽  
Term Management

Targets and limits for long-term management are used in fisheries advice to operationalize the way management reflects societal priorities on ecological, economic, social and institutional aspects. This study reflects on the available published literature as well as new research presented at the international ICES/Myfish symposium on targets and limits for long term fisheries management. We examine the inclusion of ecological, economic, social and institutional objectives in fisheries management, with the aim of progressing towards including all four objectives when setting management targets or limits, or both, for multispecies fisheries. The topics covered include ecological, economic, social and governance objectives in fisheries management, consistent approaches to management, uncertainty and variability, and fisheries governance. We end by identifying ten ways to more effectively include multiple objectives in setting targets and limits in ecosystem based fisheries management.

scholarly journals Demersal Assemblages on the Soft Bottoms off the Catalan-Levante Coast of the Spanish Mediterranean

2011 ◽  
Vol 2011 ◽  
pp. 1-16 ◽  
Author(s):  
Mariano García-Rodríguez ◽  
Pere Abelló ◽  
Angel Fernández ◽  
Antonio Esteban
Keyword(s):  
Fisheries Management ◽  
Depth Distribution ◽  
Ecosystem Approach ◽  
Western Mediterranean ◽  
Multispecies Fisheries ◽  
Middle Slope ◽  
Soft Bottoms ◽  
High Species Richness ◽  
Total Species ◽  
Upper Slope

The analysis of 255 bottom trawl samples obtained in annual experimental surveys (2007–2010) along the western Mediterranean shows the existence of five well-defined demersal assemblages that follow a depth distribution: (a) upper shelf assemblages, including two assemblages differentiated by the type of substrate (sand-muddy and terrigenous muddy bottoms); (b) a middle shelf assemblage; (c) an upper slope assemblage; (d) a middle slope assemblage. Faunally, they are dominated by fish (37% of 452 total species), followed by crustaceans (22%), molluscs (17%), echinoderms (9%), and other invertebrates (15%). The assemblages identified showed major alterations on the shelf and shelf edge and less pronounced ones on the upper and middle slope. The average diversity values were more or less high, evidencing the high species richness in the western Mediterranean. The identified assemblages may facilitate future multispecies fisheries management based on an ecosystem approach.

THE INNOVATION OF VULNERABLE FISHERIES USING ECOSYSTEM-BASED FISHERY MANAGEMENT APPROACH: A TEST CASE IN KARIMUNJAWA ECOSYSTEM, CENTRAL JAVA, INDONESIA

2016 ◽  
Vol 78 (4-2) ◽  
Author(s):  
Mayanggita Kirana ◽  
Indah Susilowati ◽  
Kuperan Viswanathan
Keyword(s):  
Fisheries Management ◽  
Fishery Management ◽  
Meta Analysis ◽  
Marine Ecosystem ◽  
Primary Data ◽  
Management Approach ◽  
New Paradigm ◽  
Initial Finding ◽  
Central Java ◽  
The Government

The sustainability of marine ecosystem has become a major concern the government; however, the implementation of sustainability-based fisheries management has not been fully carried out and well controlled. Therefore, having a concept of ecosystem-based fisheries management (EBFM) is essential in protecting it preserved. The aim of this study was to analyze the implementation of EBFM in Karimunjawa ecosystem, Central Java, Indonesia. The analysis of this study was based on the primary data collected from fishermen and stakeholders using in-depth interviews, and the secondary data gathered from stakeholders of Karimunjawa documentation. Meta-analysis with triangulation was invoked in this study. The result showed that the vulnerability of marine ecosystem, particularly fisheries’ resource in the pilot project is in progress. The conventional approach has not yet succeeded in managing fisheries’ resource in terms of sustainability attributes. Moreover, the EBFM has not yet proven to be a suitable approach for some reasons; although, this concept is very promising in encouraging a new paradigm for sustainable management in Indonesia with a protocol concept. This initial finding needs to be furthered in order to explore other aspects of development. 

scholarly journals A framework for ecosystem impacts assessment using an indicator approach

2005 ◽  
Vol 62 (3) ◽  
pp. 592-597 ◽  
Author(s):  
P.A. Livingston ◽  
K. Aydin ◽  
J. Boldt ◽  
J. Ianelli ◽  
J. Jurado-Molina
Keyword(s):  
Fishery Management ◽  
Ecosystem Impacts ◽  
Implementation Challenges ◽  
Management Actions ◽  
Indicator Approach ◽  
Research Organizations ◽  
Ecosystem Indicators ◽  
Ecosystem Level ◽  
Associated Species ◽  
The Impact

Abstract Assessment of the historical, present, and future states of marine ecosystems and the effects that humans and climate have on the state of an ecosystem are crucial to the scientific advice required to implement an ecosystem-based fishery management system. Management of federal groundfish fisheries in Alaska considers not just the target fishery, but also the possible impact those fisheries might have on other species and the ecosystem. Management actions have ranged from providing protection of endangered species in the region to preventing new fisheries from starting on key foodweb components such as forage fish. A scientific framework for providing ecosystem-based advice that puts the ecosystem first has been evolving over the past few years. This framework provides a way of assessing ecosystem factors that influence target species, the impact the target fishery may have on associated species, and ecosystem-level impacts of fishing. An indicator approach that describes ecosystem status, and trends and measures of human and climate influence has been developed to provide advice to fishery managers. This approach is now being expanded to utilize a variety of models to predict possible future trends in various ecosystem indicators. Future implementation challenges include the refinement of these predictive models, and the inclusion of climate into the models. Identification of sensitive and meaningful ecosystem indicators is also required before a more formalized decision-making process, one that includes ecosystem considerations, can be developed. Most important, the culture of fishery management and research organizations needs to change to embrace the ecosystem-based protections already mandated by various laws.

scholarly journals Modeling the Dynamics of Multispecies Fisheries: A Case Study in the Coastal Water of North Yellow Sea, China

2020 ◽  
Vol 7 ◽  
Author(s):  
Jia Wo ◽  
Chongliang Zhang ◽  
Xindong Pan ◽  
Binduo Xu ◽  
Ying Xue ◽  
...  
Keyword(s):  
Model Validation ◽  
Fisheries Management ◽  
Yellow Sea ◽  
Sensitivity Analyses ◽  
Size Spectrum ◽  
Quality Of Data ◽  
Estimation Model ◽  
North Yellow Sea ◽  
Multispecies Fisheries ◽  
Spectrum Model

Ecosystem models have been developed for detecting community responses to fishing pressure and have been widely applied to predict the ecological effects of fisheries management. Key challenges of ecosystem modeling lie in the insufficient quantity and quality of data, which is unfortunately common in the marine ecosystems of many developing countries. In this study, we aim to model the dynamics of multispecies fisheries under data-limited circumstances, using a multispecies size-spectrum model (MSSM) implemented in the coastal ecosystem of North Yellow Sea, China. To make most of available data, we incorporated a range of data-limited methods for estimating the life-history parameters and conducted model validation according to empirical data. Additionally, sensitivity analyses were conducted to evaluate the impacts of input parameters on model predictions regarding the uncertainty of data and estimating methods. Our results showed that MSSM could provide reasonable predictions of community size spectra and appropriately reflect the community composition in the studied area, whereas the predictions of fisheries yields were biased for certain species. Errors in recruitment parameters were most influential on the prediction of species abundance, and errors in fishing efforts substantially affected community-level indicators. This study built a framework to integrate parameter estimation, model validation, and sensitivity analyses altogether, which could guide model development in similar mixed and data-limited fisheries and promote the use of size-spectrum model for ecosystem-based fisheries management.

scholarly journals Fishing for function: the use of biological traits to evaluate the effects of multispecies fisheries on the functioning of fisheries assemblages

2016 ◽  
Vol 73 (4) ◽  
pp. 1091-1103 ◽  
Author(s):  
Martha Koutsidi ◽  
Evangelos Tzanatos ◽  
Athanassios Machias ◽  
Vassiliki Vassilopoulou
Keyword(s):  
Functional Traits ◽  
Fisheries Management ◽  
Eastern Mediterranean ◽  
Ecosystem Approach ◽  
Purse Seine ◽  
Small Scale ◽  
Biological Traits ◽  
Multispecies Fisheries ◽  
Important Target ◽  
The Relationship

Abstract The Ecosystem Approach to Fisheries Management claims that fisheries management should take into account the ecosystem processes; in that context, it is useful to examine the functional traits of fisheries assemblages. This can be a challenge in multispecies fisheries. We used 21 biological traits of 86 species to investigate the relationship between-species and trait composition and to identify species with rare functional traits. Combining these traits with two catch datasets from the eastern Mediterranean (Patraikos Gulf: small-scale fleet, eastern Ionian Sea: entire multispecies fleet), we investigated whether certain fishing tactics or gears tend to remove specific traits, using multivariate methodologies. Species and traits composition of the catches were related, but an important part of trait variability was not explained by species composition. Rare traits and trait combinations were found for important target or bycatch species. Differences in the traits composition of fishing operations were revealed both between fishing tactics (Patraikos) as well as gears and areas (eastern Ionian); hierarchical clustering and MDS indicated the distinction of purse-seine catches at gear level. SIMPER analysis by trait indicated associations of certain trait categories mainly with purse-seines (at gear level) and longline métiers and a trammel-net métier (at métier level). The identification of rare traits or their combinations can have significant management implications as overfishing of the species with these traits could result in altering assemblage functioning. It seems that the multispecies character of the benthic fisheries results in a balanced trait removal, while management should regulate the effects of purse-seine fisheries on the fisheries assemblage functioning. Further investigation of the functions that fishing may remove from the ecosystem could contribute to understanding the effects of fishing and reveal overlooked aspects useful for the improvement of fisheries management.

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